CY7C68310 CYPRESS [Cypress Semiconductor], CY7C68310 Datasheet - Page 12

• Manufacturer Part Number: CY7C68310
• Manufacturer: CYPRESS [Cypress Semiconductor]

5.2.3
The vendor-specific EVENT_NOTIFY command enables the
CY7C68310 to communicate the occurrence of certain USB
and system events to the attached device if the device’s
Table 5-3. Notification Register Read Values
The nSTATE0 and nSTATE1 values are read from the device
and stored for use as the STATE0 and STATE1 values during
the next execution of the event notification command. The
nSTATE0 and nSTATE1 values provide temporary non-volatile
storage for devices whose power is controlled by nPWR500
(typically bus-powered systems). This allows the device to
Table 5-4. Notification Register Write Values
The STATE0 and STATE1 values are written with the value of
nSTATE0 and nSTATE1 obtained from the previously
completed event notification command. Assertion of nRESET
resets STATE0 and STATE1 to 0x00.
6.0
Certain timing parameters and operational modes for the
CY7C68310 are configurable. Some USB configuration and
descriptor values are also configurable. CY7C68310 configu-
Document 38-08030 Rev. *H
Error
Sector Count
LBA Low (Sector Number)
LBA Mid (Cylinder Low)
LBA High (Cylinder High)
Device/Head
Status
Features
Sector Count
LBA Low (Sector Number)
LBA Mid (Cylinder Low)
LBA High (Cylinder High)
Device/Head
Command
Vendor-specific EVENT_NOTIFY Command
Register
Register
Configuration
Reserved Reserved Reserved Reserved
Reset
BUSY
USB
7
7
Specific
Reset
Class
6
N/A
6
Suspend
USB
5
N/A
5
Specified in Configuration byte 0x02
Resume
USB
firmware supports the EVENT_NOTIFY command. The
command code is specified by configuration address 0x02.
Setting this byte to 0x00 disables the EVENT_NOTIFY
feature.
store information prior to entering a USB Suspend state for
retrieval after resuming from the USB Suspend state. Note that
a USB Reset from the host may interrupt the collection of data.
The device must accommodate the potential for this occur-
rence. The BSY and DRQ bits must be cleared by the device
upon the completion of an event notification command.
ration data should not be confused with the USB Configuration
Descriptor data.
6.1
tor Sources
CY7C68310 configuration and USB descriptor data can be
retrieved from three sources. Table 6-1 indicates the method
of determining which data source is used.
4
N/A
4
nSTATE0
nSTATE1
STATE0
STATE1
Reserved
CY7C68310 Configuration and USB Descrip-
N/A
N/A
N/A
N/A
Powered
N/A
N/A
Self-
3
DRQ
3
Reserved
Powered
Bus-
2
N/A
2
Eject Button
High-Speed
Pressed
USB
N/A
1
1
CY7C68310
Page 12 of 34
Full-Speed
Released
Button
Eject
USB
N/A
0
0